What is the microorganism that acts as a source of plant nutrients in the soil ........

Agriculture and Rural Development (Phase-I/II) Farm and agri engineering

What is the microorganism that acts as a source of plant nutrients in the soil?

This questions was previously asked in

Nabard grade-A,Previous year Memory Based Paper (2022)

Biofertilizers

Azolla

Ammonia-oxidizing bacteria

NPK fertilizer

None of the above

- Option 1: Biofertilizers

- Biofertilizers are microorganisms that enhance nutrient availability in soil.

- They play a crucial role in the fixation of nitrogen, solubilizing phosphorus, and decomposing organic material.

- Correct Answer

- Option 2: Azolla

- A water fern that hosts cyanobacteria, aiding nitrogen fixation in rice paddies.

- Not a direct nutrient source for general soil.

- Option 3: Ammonia-oxidizing bacteria

- Participate in nitrification, converting ammonia into nitrite.

- These bacteria are part of the nitrogen cycle but not a standalone nutrient source.

- Option 4: NPK fertilizer

- A chemical fertilizer containing nitrogen (N), phosphorus (P), and potassium (K).

- Not a microorganism.

- Option 5: None of the above

- This option is incorrect since biofertilizers are indeed a correct choice.

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